Pbgitogtxotf ojsi valuable peodttcts tfbom seontast wax



P'UHGS, OF LUDWIGSEN-QI V-TEE REINE, AND MICHAEL J'AHRSTDEIFEB,

F MANNHEIM, GERMANY, ASSIGNORS TO I. G. FABBENIND'USTRIE AKTIENGESELL- 'SGEMZIQUE? FBANKFORT-OH-THE-MAIN, GERMANY, .QYCORPORATION'QF GERMANY raozouc'rrou' or vanunnnn enonoc'rs rnom JiiONTAN wax:

iti'olbrawing. application filed September 1827, Serial No. 218,864, and in Germany September 192x65 Grude Montan wax consists, mainly, in addition to resin acids, tatt acids and the like,

of valuable wax esters similar to those contained in carnauba Wax in which the said wax esters usually consist of a mixture of esters of acids of high. molecular weight containing from 26 to 29 carbon atoms, wlth alcohols of the type 01"" triacontyl alcohol (C H OH) and the like. In the refining processes whichare usually employed, such as distillation, or

bleaching'withcromic acid in aqueoussuL- furic acid, the valuable wax is extensively decomposed to acids, and even in the case-of Montan wax which has lieen bleached in a protective manner as for example'according to theGerman Patent No.409,420, acids similar to those contained in the crude wax are found and impair the good properties of the wax. v l

N e havenow found that the valuable wax esters ma be separated from the said acids in a siinp e manner by treating Montan wax with hot concentrated acetic acid. According to this method of working the valuable unsaponified wax may be separated from the other constituents such-asresin acids, fatty acids, and the like, both in the case of the crude wait and of the wax which has been. freed trom resins, or has been more or less exitensively saponified, as for example "by bleaching with chromicacid in aqueous sulfuric acid solution, or has been pro-treated in any other way. I

A wax or excellent properties may be obtained by applying the treatment with concentrated acetic acidto Montan wax which has been bleached withchromic acid in thepresence of glacialacetic; acid with or without an addition of smallquantities of sulfuric acid.

- The following e a a Wm-lama, i1-

out in practice lustrate how th enriched in wax esters, and impoverished acids and pigmentary constituents. E'wample 2' tan wax, in boiling lacial acetic acid to which from 10 to 20 cu ic centimetres of concentrated sulfuric acid have been added, are bleached with a concentrated solution of about 500 grams of chromic acid, the mixture being then allowed to cool. Thebleached 500grarns of crude, or de-resinified, MOD:

Wax separates out, above the glacial acetic 4 acid mother liquor containing the fatty acids, as a greenish-yellow cake, which is removed. To eliminate the chromic acid salts and organic acids still contained in the wax, the

latter is boiled again with. glacial acetic acid treated with a little lime,and then allowe to cool as slowl as possible. The wax then removed may e boiled again with clean water, and is only very slightly colored.- .By

diluting the glacial acetic acid solution sepa-.

rated from the wax esters with water, a product is obtained which consists, for the most part, of Montanic acid.

' I Emample wi 500' grams of crude or deresin'ified Mon- I tan wax are heated to boiling with a mixture of 700 cubic centimetres of concentratedsuh furic acid and 2000 cubic centimetres of water, whereu on 700 grams of chromic acid in the state 0 a concentrated aqueous solu'-' tion are slowly added, After prolonged stiroured into hot water,

ring, the mixture is leached, but strongly and, when cold, the

saponified, product is filtered ofi. By boiling with 5 litres of lacial acetic acid and carefu. cooling, the still unsaponified wax, which forms a" solid cake above the glacial acetic acid solution, can be removed. After being washed with water, and melted in vacuo, the

wax purified in this manner has the melting point of from 88 to 89 (3. The product (chiefly Montanic acid) which separates out in a finely divided condition from the, glacial aceticacid solution on fur ther cooling, can be filtered ofi by suction and after being washed, and melted in vacuo, has the melting oint 9. free 81 to 83 c are What We claim is:

1., The process of separating the wax eetem contained in refined Montan Wax which c0mprises boiling the said Moneen wax with 0011- centretedlaeetieac'id. 1

2. The process of separating the Wax esters contained in Montan wafx bleached by treatment with chromic. acid in the presence of glacial aeetie acid and sm ll quantities of sulfuric acid,lwhich, comprises boiling the.

said Montan wax with concentrated e'cetie eel y In testimony ourhands.

WILHELM PUNGS. MICL JAHRSTORFER.

whereof we he re hereunto :set 

